Abstract:
This invention is related to the control of railway traction vehicles. A transmitter (1) is placed between the pedestal liner and the journal box of a wheelset. The transmitter (1) registers every change of pressure between the traction (F) and the bracking (B) force. A signal is generated and transformed into a command to control the power setting of the traction vehicle.
Abstract:
Die Erfindung betrifft ein Verfahren zum Steuern eines Anfahrvorgangs eines elektrisch angetriebenen Fahrzeugs, dessen Elektromotor über einen Umrichter gespeist wird, bei dem ein zum Verhindern eines Zurückrollens des Fahrzeugs notwendiges Festhaltemoment ermittelt wird. Durch einen Einsatz von Sensoren zur Bestimmung von Wagenmassen sowie von Sensoren zur Bestimmung von Streckenneigungen ist eine genaue Bestimmung des Festhaltemoments möglich. Um einen maschinenschonenden Anfahrvorgang des elektrisch angetriebenen Fahrzeugs zu erreichen, wird vorgeschlagen, dass, solange eine ermittelte Motordrehzahl (n) kleiner ist als eine vorgegebene Grenzdrehzahl (n 1 ), ein Traktionsmoment (M T ) von einer Steuereinheit des Fahrzeugs auf ein vom Festhaltemoment (M F ) abhängiges Grenzmoment (M G ) begrenzt wird und das Traktionsmoment (M T ) von der Steuereinheit erst dann über das Grenzmoment (M G ) hinaus erhöht wird, wenn die Motordrehzahl (n) größer ist als die Grenzdrehzahl (n 1 ).
Abstract:
Conventional APUs for diesel-electric locomotives may include an AC electric generator and typically require additional hardware to be installed to convert the AC power output by the generator to DC power that can power electrical systems or charge batteries in the locomotive. According to some embodiments, there is provided an auxiliary power unit (APU) or system for operation in cooperation with a primary engine. The APU includes a secondary engine; a primary engine coolant heating system, or a primary engine lubricant heating system; a control system that automatically shuts down the primary engine and starts the secondary engine responsive to a predetermined condition; and a Direct Current (DC) power generator that generates an output voltage, the DC power generator being driven by the secondary engine.
Abstract:
The invention relates to an apparatus for measuring speed of a railway vehicle and method thereof wherein a light source is installed in the vicinity of a track and also a measuring unit is installed on a railway vehicle, thus an actual speed of the railway vehicle running along a track is measured by an indirect measuring method. An apparatus for measuring a speed of a railway vehicle is comprised of a light source installed in the vicinity of a track and emitting a circular beam or a linear beam, a measuring unit installed at the front or back of the train and receiving the light emitted from the light source, and a speed converter for converting a signal received from the measuring unit into a speed value of the train. A method for measuring a speed of a railway vehicle comprises the steps of: controlling size of a continuous beam emitted from a laser unit installed in the vicinity of a track and making a parallel beam, emitting the parallel beam to a measuring unit installed on the train, and measuring a speed of the train utilizing a time reaching a maximum level of the intensity of light.
Abstract:
A transport vehicle for traveling in a low-pressure environment structure is provided. The transport vehicle may include a deployable decelerator provided on the transport vehicle and configured to deploy from the transport vehicle to decrease a distance between the transport vehicle and the low-pressure environment structure. When the decelerator is deployed the decelerator is configured to increase drag forces opposing a direction of motion of the transport vehicle and decelerate the transport vehicle.